System Three Resins 644601131123 1/3-Inch by 1-Inch Wood Care Borate Rods, 12-Pack Bor-8-Rods are easy, low-cost and EPA approved as a decay protection and prevention system for wood Bor-8-Rods are molded from fused, water-diffusible borates which are internationally recognized as an effective well established wood preservative Borates also effectively control termites, carpenter ants, a variety of beetles, and many other wood boring insects Borates are highly toxic to fungal decay and many insects at concentrations that are not poisonous to humans or other mammals Measures 1/3-Inch by 1-Inch size